What is it?

The AMC7140 is one of the largest low-cost linear constant current drivers. Intended for driving mid-high power LEDs, the AMC7140 is an adjustable low-side constant current driver, adjustable up to 700mA. The AMC7140 can use a very high supply voltage, though due to the relatively high current likely involved, the supply voltage must be fairly close to the operating voltage of the load.

Why did you make it?

The AMC7140 is in the TO-252 package, which is entirely unsuitable for hand soldering. I needed some of AMC7140 breakout boards for my own projects, so I had these made - and I've now got more than I need.

Bare board available here

Features:

• Sold with or without screw terminals
• 1uf filter cap between power and ground
• on-board potentiometer to adjust current up to 700mA
• Linear current regulator suitable for use with LEDs or other applications.